Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Bryan D. McKinley0
James L. Bush, III0
Douglas L. Robertson0
Tommy O. Lowe0
Marenz S. Ganadillo0
Date of Patent
October 31, 2006
0Patent Application Number
108809040
Date Filed
June 30, 2004
0Patent Primary Examiner
Patent abstract
The invention provides a system and method for detecting the presence of an ink jet printhead when a printhead controller fails to properly identify an installed printhead using a printhead identification device. The system includes a printhead including heater resistors and control elements, and a controller connected to the printhead via address and data lines. When the controller fails to properly identify an installed printhead, the controller operates to bias the control elements in a predetermined manner via at least one address line, detect a signal via the data lines, and generate a signal indicative of the presence of the installed printhead.
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